PC9-0331

Atmospheric Photoemission
Yield Spectrometers−AC Series−

Photoemission Yield Spectroscopy in Air (PYSA)

General Catalog
Model : AC-5

A new approach to advanced
technology development−For easy measurement of work function and ionization potential−

Model : AC-2

1991: Ichimura Industry Award
2006: ADY Excellence Award
2006: Orgatechno Award(Manufacturing & Equipment Category)
2015: Heritage of Analytical and Scientific
Instruments Certification

Model : AC-3

Allows Easy Measurement of Work Function and Ionization Potential—
Accelerating New Material Development and Evaluations
Developed by Dr. Masayuki Uda at Riken, the Atmospheric Photoemission
Yield Spectrometer (Photoemission Yield Spectroscopy in Air [PYSA]) is akind of photoelectron spectrometry which is capable of measuring work
function and ionization potential in open air. It can count the number ofphotoelectrons by using the open counter. It was the world’s first analyzer
introduced as the AC Series by Riken Keiki, and the manufacture and salestarted in 1986.
In the more than 30 years since its launch, it has contributed to thedevelopment of new materials, including nanocarbon materials andorganic electroluminescent displays (ELDs), and advanced research anddevelopment on evaluating materials for silicon/hard disks and the like.
Nowadays, it’s also used in research and development on state-of-the-art
technologies in fields like new energy (for example, solar panels and fuelcells) and the food industry.
This catalog describes the features and principle of the AC Series ineasy-to-understand terms, together with the features, specifications, andapplications of the Riken Keiki AC Series products.
*The "AC" of the AC Series refers to "air" and "counter" (counting electrons in the air).
They are now referred to as open counters after it was subsequently determined thatmeasurement is possible in gases other than the air.

Model : AC-5

See pp. 6–8 for primary applications.

Organic
electroluminescentdisplays

Hard disks

Solar panels

Food(beverages)⇒p.10

Latest model with new detector•	Incorporates new detector for extended dynamic range
in electron counting.
•	Supports large samples up to 180 × 180 mm.
(AC-2 supports sizes up to 50 × 50 mm.)
•	Sample changer automates measurement.
•	Allows high-intensity light measurement using Xe (xenon)
lamp.

Model : AC-3

⇒p.11

Model supporting high-energy measurement•	Capable of measuring high energy of up to 7.0 eV in open air.
•	Ideally suitable for measuring organic materials and thin films
with high work function and ionization potential.

Model : AC-2

⇒p.11

Model widely used worldwide• The AC-2 model is intended for use in academia.

2Why Is the AC Series So Widely Chosen by Researchers?
A single measurement takes approximately five minutes.
Easy operation with dedicated software—Enabling rapid measurement of large volumes of samples
Extremely fast measurement from start to finish, with a single
measurement taking approximately five minutes. The Riken
Keiki AC Series also uses dedicated software that makes
operation easy for anyone. Work function and ionization potential
measurements previously required specialist knowledge; now,these can be measured within a short time by anyone, helping tospeed up development.

The AC Series measure samples in open air—Providing results corresponding to actual
conditions (Powders and liquids can also bemeasured.)Since most products are used in open air, the results obtained ina vacuum may not be actual. In the first place, powder or liquidmaterials are hardly measured in a vacuum.
The AC Series measure in open air, allowing evaluation in actual
usage conditions. It’s also easy to compare materials before andafter processing for results corresponding to actual conditions.

No vacuum required—Reducing initial and running costs
Conventional systems for measuring work function and ionization
potential require a vacuum for measurement. The AC series canmeasure in open air without a vacuum. This reduces costs by
reducing initial and running costs of equipment.

Widely used by researchers, with papers
published worldwide exceeding 1,600
The AC Series are used for research and development in a wide range of fields,with results published as papers. More than 1,600 papers* have been publishedworldwide.
Even today, they’re in use by researchers around the world to compile papers.
*Until June 2018

3

The Principle of the AC Series
Operating principle
Ultraviolet photons emitted from an ultraviolet
lamp undergo wavelength selection (energy
selection) in a spectrometer before being focusedon the surface of a sample placed on the sample
stage (in open air). Photoelectrons discharged dueto the photoelectric effect (phenomenon in whichelectrons are discharged from a material surface
when the material absorbs light) are counted by anopen counter, and the count is processed and theresults displayed on a PC. The wavelengthλ ofthe ultraviolet radiation is converted into the lightenergy E using the following equation.

Spectrometer

Controller

UV lampOpen
counter

PC

Optical fiberElectron

Systemconfiguration(AC-2)

SampleSample stage
X-θ stage

Threshold energy==> Ionization potential==> Work function

Square root of electron
yield (CPS)

E = hν= hc
λ(h: Planck constant, ν: frequency, c: speed of light)

The value of the threshold energy of photoemission,
which corresponds to the ionization potential, isdetermined from the energy of an interesting point
between the background line and the extrapolatedline of the linear portion of square root plots of thephotoemission yield. If the sample is metal, thevalue of the threshold energy of photoemission
corresponds to the work function.

Photon energy (eV)PC screen(A measurement sample of AC-2)* CPS: Counts per second; unit of electron count rate
(number of electrons counted per second)

System configuration (AC-2)
A system configuration sample of AC-2 is shown in the following diagram. The whole equipment is divided into
the display and operating unit, LC1 (light source unit), and DC1 (measuring unit). Furthermore, the spectrometerof AC-3 and the sample stage of AC-5 are not the same as those of AC-2.

Display and operating unit

LC1 (light source unit)

DC1 (measuring unit)
Air dryer

Optical fiber

Display

Printer

UV lampLightadjuster

Compressor(optional)

Detector

Spectrometere

UV lamppower
supplySample stage
Z stage

SampleLightintensity
measuringunit

X stageLow energy
Electroncounter

X-stage driver
PC
Controller

e : Electron

Controller: UV radiation: Signal

4: Air

AC Series

Atmospheric Photoemission Yield Spectrometers
Electron counting principle by the open counter

The open counter repeats the following operations to count electrons:

1. Electron
generation
Electroncounting
principle by the open counter
Open counter
Preamplifier

Open counter

VA UVStageVGq

SampleUV: Ultraviolet radiation

Stage

Preamplifier

Open counter

Preamplifier
Vs
VGq

A

VGs

Gq Gs
VA

Samplelectron cocircuit
unting circuit
ElectronEcounting

Open counter

2. Electron movement using oxygen as a carrier② Electron movement using oxygen as a carrierThebindto tooxygennegative
The electrons
electrons bindoxygen(O2),(Oforming
negative
oxygenoxygenions that2), formingionsdriftthetowardthe openAftercounter.
After
passagethroughdriftthattowardopen counter.
passagethrough
the Gsand GqtheGs theandelectrons
Gq grids,
electrons
are carried
to thea anode(A)
grids,
are thecarriedto the anode(A) to whichhigh voltage
tois whicha highvoltage isareapplied.
are (Ostripped
applied.
The electrons
strippedThefromelectrons
the oxygen2) by thefrom
the oxygen
the tononuniform
nonuniform
electric(Ofield
the anode. electric field close to2) byclose
the anode.

VGs

GqSample
Gs○

Gq: Quenching grid

Preamplifier
Vs
VGq
VGq

A

Electron counting circuit
Electron counting circuitThe
open counter
repeats the following
to count
electrons: byElectrons
are discharged
from theoperations
sample whenbombarded
UV radiation. An electric field is produced on a suppressor grid①(Gs)Electron
generation
to whicha voltage is applied. The electrons are directedElectrons
discharged
towardthe areopen
counter. from the sample when bombarded by UV
radiation. An electric field is produced on a suppressor grid (Gs) towhich a voltage is applied. The electrons are directed toward the open
counter.
Symbols in the diagrams:
A : AnodeGs : Suppressor gridⓔ : Electron
Symbols in the diagrams:
Gq : Quenching grid
UV:
Ultraviolet
radiatione : Electron
A: Anode
Gs: Suppressor grid

SampleStage
Stage

3. Electron detection by electron avalanche

anode. The signals detected are amplified by a preamplifier.

*The electron avalanche amplifies each individual electron into 105 to 107 electrons.

Open counter
Preamplifier

Open counterA

Preamplifier
Vs
VGq

VA

SampleSample* The electron avalanche amplifies each individual electron into 105 to 107
electrons.

Stage

Stage

4. Electron avalanche quenching

Cations generated in the vicinity of the anode interfere withelectron detection, so the grid voltage is varied after electron
detection
to stopthe electron avalanche. The sampling④pulseElectronavalanche
quenchinggridcapturestheincations
generated
andinterfere
prevents
Cations
generatedthe vicinityof the anodewithelectrons
electronfromentering
thegrid
detector.
The
conditions
are thendetection,
so thevoltage isvariedafter electron
pulserestored
detectionto
totheirstate.
stop original
the electron
avalanche. The sampling grid captures the cations
generated and prevents electrons from entering the detector. The
conditions are then restored to their original state.

VGs

Gq Gs

Elecounting
ctron councircuit
ting circuit
Electron

The electrons are accelerated in the nonuniform electric
causing
an ionizing"electron
avalanche (discharge
Electrondetectionby electron
avalanche③field,phenomenon)"due
tocollisionswithsurrounding
molecules.
The electrons are accelerated in the nonuniform electric field,
causingThelarge
numberoftheelectrons
generated*aredetected
an ionizing "electron avalanche (discharge phenomenon)" due to asdischarge
pulse
signals bymolecules.
the anode.
Thesignals
detectedcollisions withsurrounding
The
large
numberof the areamplifiedbyapreamplifier.
*electrons generated are detected as discharge pulse signals by the

① ②

③

④ ① ②

③ ④

Counter
operationmodes
and individualCounter operationmodes
and individualcomponent voltages
component
voltages(The
above
numberscorrespondcorrespond toto operation
operation numbers.)
(The
above
numbers
numbers.)

5

The Principle of the AC Series
Energy diagram
The energy diagram illustrates the orbits and energy of electrons inside a material. It’s a fundamental diagram forunderstanding how electronic devices work.

Vacuum
level

Fermi
level

Work function

Conduction
band

Conduction
band
Valenceband

Ionization potential
LUMO

Energy gap
Bandgap
Valenceband[For metals][For semiconductors]

Energy diagrams for metals,
semiconductors, and organic
materials* HOMO:	Highest Occupied MolecularOrbital
LUMO:	Lowest Unoccupied MolecularOrbitalHOMO*	Options are also available for measuring
band gap and energy gap.
Contact Riken Keiki for more information.

[For organic materials]

The values measured by the AC Series (photoelectric emission threshold energy) are work function (for metals)
and ionization potential (for semiconductors and organic materials). This therefore reveals the valence band
upper-end energy for metals and semiconductors, and the HOMO energy for organic materials.

Comparison with other principles
Comparisons with other principles for measuring work function and ionization potential are given below.
Ultraviolet photoelectron spectroscopy (UPS)

Cyclic voltammetry (CV)The total number of emitted electrons per
incident photon is counted as a function ofphoto energy.

The kinetic energy distribution of the emitted
photoelectrons (i.e. the number of emitted
electrons as a function of their kinetic energy)
is recorded using vacuum UV (21 eV) radiation.

A voltage (potential) is applied to samples
in the electroly te. The current value
corresponding to the potential is measured.

Solids, thin films, powders, liquids

Solids, thin films

Molecules in liquid

Examplemeasurements

Square root of electron
count rate (CPS)

Objects to bemeasuredThreshold energy==> Ionization potential==>Work function

Current (uA)Principle

Photoemission yield spectroscopy in air (PYSA)Electron count rate (CPS)
× 1,000

Principle namePotential (V vs. SCE)
Kinetic energy

Photon energy (eV)Measurement
environment

In open air

In vacuum•Even electrodes and organic materials canbe measured. (Results can be compared)•Wide measurement range (0 eV to 21 eV)•Easy measurement•Relatively short measurement time

Advantages•Minimal damage, with high repeatability,
even for the same organic samples•Even electrodes and organic materials canbe measured. (Results can be compared.)•Absolute value measurement•Operation is simple, enablingmeasurement by anyone.
•Short measurement time (several minutes)•Narrow measurement range (3.4 eV to 7.0 eV)•Susceptible to damage from intense UV
radiation•Operation is complex, requiring specialist
knowledge•Long measurement time (several hours)•Results cannot be compared whenmaterials are insoluble in the same solvent•Relative measurement•Low reliability•Data analysis is difficult

Disadvantages

6

In liquidUses for the AC series
Material selection (screening)⇒ Case study 1 (p. 8)

Applications:	Organic electroluminescent devices, organic transistors, organic thermoelectric transducer
nanocarbon materials, graphene, fullerene, carbon nanotubes, transparent conductive films,
quantum dots, nanoparticles, metal electrodes
Charge transfer characteristics can be predicted to selecteffective materials by plotting energy diagrams using thework function and ionization potential measured using the
AC Series.

Indices for new material development⇒ Case study 2 (p. 8)

Applications:	Photocatalysts, fuel cells, lithium-ion batteries, organic solar cells, inorganic solar cells,
dye-sensitized solar cells, Perovskite solar cells
Charge transfer characteristics can be predicted to use as
indices for new material development by plotting energy
diagrams using the work function and ionization potential
measured using the AC Series.

Material surface film thickness measurement⇒ Case study 3 (p. 9)

Applications:	Silicon devices (pre-processing), lead frame bonding wires,
metal/oxide film deposition hard disks
Graph slope and discharge electron counts measured using
the AC Series can be converted into film thickness to measurematerial film thickness.

Electron state analysis of liquid samples
Applications: Food, chemicals, cosmetics, pharmaceuticals, medicine
The AC Series can measure even liquids and powders
in open air, enabling electron state analysis in actual
conditions.

7⇒ Case study 4 (p. 9)

The AC Series Measurement Case Studies
Material selection (screening)
Case study 1: Ionization potential measurement of organic electroluminescent materials

What the AC Series reveals(Explanation of phenomena)
Irradiating a material with UV radiation increases the energy of electrons exactly
by the energy of the UV radiation (hν). Electrons are emitted from the material if
the electron energy exceeds the vacuum level. The ionization potential (IP) can be
estimated from the electron emission threshold energy.

hν< IP↓No electron
dischargehνhν> IP↓Electrondischargehν

AC Series display

Vacuum
level
LUMO
HOMO

hν

Vacuum
level
LUMO
HOMO

hν

Square root of electron
count rate (CPS)

Manufacture of organic
electroluminescent devices
requires selection (screening)of optimum charge injection
materials for charge injection
into luminescent materials.
Charge transfer at the materialinterface is important here,
and ionization potential forms
a key fac to r in eva lu ating
materials. The AC Series areable to measure ionization
potential quickly and easily inopen air.

ThresholdenergyPhoton energy (eV)

Ionization potential of organic thin films
Ionization potential for metals differs between vacuum
and in open air due to sur face oxidation but isrelatively consistent for organic materials. These are
the results of measuring organic materials in open airand vacuum.

In open air In vacuum
Alq3

5.84eV

5.8eV

a-NPD

5.50eV

5.4eV

CuPc

4.99eV

5.2eV*	In open air : AC Series
In vacuum : Measured using ultraviolet photoelectron spectroscopy

Indices for new material development
Case study 2: Searching for fuel cell materials (energy)

What the AC Series reveals(Explanation of phenomena)
Electron transfer from electrode to material A )causes a chemical reaction. You can see theVoltagefollowing using the AC Series.

×0VA) Electrode HOMO < Material LUMO==> No electron transfer
B) Apply voltage (low) to electrode
Electrode HOMO > Material LUMO==> Electron transfer (High efficiency example)C) Apply voltage (high) to electrode
Electrode HOMO > Material LUMO==> Electron transfer(Low-efficiency example requiring high voltage)
Oxygen reduction
reaction potential (V)A breakthrough in the performanceof renewable energy devices such as
artificial photosynthesis, solar cells,
photocatalysts, fuel cells, and storage
batteries has become a pressing
need to curb global warming. Thishas produced strong demands fordevelopment of new materials differingfrom conventional materials. For
example, searching for materials to
replace platinum for the cathodes offuel cells traditionally involved wide useof CV measurement.
Using the AC Series
which are capableof measuring solidmaterials enablese f f i c i e n t m a te r i a lsearching.

B)-

Voltage
Low

C)-

VoltageHigh

Electrode

Material

Correlation between ionization potential and oxygen
reduction reaction voltage (EORR) of fuel cell
Ionization potential (eV)8

A. Ishihara, M. Tamura, K. Matsuzawa, S. Mitsushima and K. Ota,
J. Fuel Cell Sci. Technol, 8 (3), 031005

Material surface film thickness measurement
Case study 3: Silicon oxide film thickness measurement

What the AC Series reveals(Explanation of phenomena)
The volume of electrons discharged from a material varies depending on the thicknessof the silicon wafer.
With thinner films, a greater volume ofelectrons is discharged; with thicker films,
the surface film forms an obstruction, and asmaller volume of electrons is discharged.
Measuring the electron discharge fora known film thickness at a constantultraviolet intensity and plotting this on agraph enables determination of unknown
Thin film
Thick film⇒ 	L arge electron⇒ 	Small electron
film thicknesses.
discharge
discharge

Correlation between silicon wafer
surface oxide film thickness andelectron count rate
We see clearly that the electron discharge decreases
as the oxide film thickness increases.
Allows measurement in open air even of films
measuring just a few Å in thickness.

Electron count rate (CPS)

Semiconductor materials
require confirmation of film
thickness uniformity. However,s te a d y i m p r ove m e n t s w i t h
integration in recent years haveresulted in thinner films, making
thickness measurements by
conventional methods (FT-IR)
dif ficult. The AC Series canmeasure film thicknesses at
an angstrom level by using theelectron permeability of thinfilms. And it also allows film
thickness evaluation in highintegration.

Oxide film thickness (Å)
M. Uda, Jpn. J. Appl. Phys., 24 (1985) 284

Electron state analysis of liquid samples
Case study 4: Measuring catechins in water

What the AC Series reveals(Explanation of phenomena)
Biological activity including
antioxidant, anticancer (suppressing
cancer cell grow th), antibacterial,
and antiviral (deactivating) properties
is generally repor ted to be higher
i n c a te c h i n s w i t h g a l l oy l g r o u p s(gallic acid). If we use the value forstandard bottled green tea as a guide,measuring the ionization potentialof powdered catechins mixed withpure water reveals that catechins withgalloyl groups have lower ionization
potential. In practice, bottled green tea
also contains chemicals in addition to
catechins, which present issues. But
using an Atmospheric Photoemission
Yield Spectrometer provides
information on electron states undernormal daily life conditions.

EGCg: 5.46 eV
EpigallocatechingallateECg: 5.45 eV
EpicatechingallateGalloylgroups(gallic acid)

EGC: 5.68 eV
Epigallocatechin

EC: 5.72 eV
Epicatechin

Cubic root of electron
count rate (CPS)The AC Series are capable ofmeasurements in open air, whichallows electron state analysis forliquid and powder samples andpresents applications across awide range of fields, including food,chemicals, cosmetics, medicine,and pharmaceuticals. Catechinsforming the astringent componentof green tea are widely reported
to exhibit biological activity. The
following experiments show thatcatechins, which was reported
to have a high biological activity,
showed a low ionization potential.

Photon energy (eV)D. Yamashita and A. Ishizaki, Anal.Sci., 32 (2016) 577

9

The AC Series Model Introductions
Model : AC-5
High-end AC Series model suitable for a wide range of scenarios

Main features*Optional.

• The new sensor is capable of counting up to 4,000 photoelectrons per second.
	Counts approximately twice the number of photoelectrons compared to the AC-2 or AC-3.
Offers even greater accuracy.

•	Large samples up to 180 × 180 mm
can be mounted.
	The large sample stage dramatically increases the size of samples
that can be measured from the previous 50 × 50 mm (AC-2).
Large samples can be measured in their current state.

•	Specified-spot measurement allows
measurement at any locations.

Large sample stage	Specified-spot measurement allows users to specify a point on a sample
for measuring work function and ionization potential.

•	The sample changer* allows automatic
measurements of up to 25 plate or powder samples.
•	The Xe (xenon) lamp*allows high-sensitivity
measurement, even for materials like tonerassociated with low electron discharge.

Specified-spot
measurement screen
Sample changer

Plate changer

Powder changer

Measurement procedure
1.	Start the system by following theon-screen instructions.

Guidance
screen2. Mount sample and startmeasurement.

Changer screen
Allows the operator to set the name andnumber of measurement samples foreach sample.

10

3. D a t a i s d i s p l aye d byanalysis software.

Analysis screen
Also allows estimatesof state density.

Model : AC-3
Allows measurements of up to 7.0 eV.
Features•	Allows measurements of up to 7.0 eV
in open air.
	The developed nitrogen-substitution-type specialized opticalsystem is capable of irradiating samples with far ultraviolet
radiation exceeding 6.2 eV—
something previously deemed
impossible due to absorption byatmospheric air. This enables
measurements of up to 7.0 eV
in atmospheric air. Also suitable
for measurements of organic
materials
AC-3
PC screen display

Model : AC-2
Model intended for use in academia
Features•	AC Series model most widely used worldwide
for ionization potential measurement
	Numerous papers have been published worldwide based ondata obtained with the AC-2.

• Maximum light intensity 500 nW	Also capable of measuring work functions of conductive oxidematerials such as ITO (indium tin oxide)

AC-2
PC screen display

Research organizations currently using the AC Series (partial list)
University of Tokyo, Kyoto University, Nagoya University, Yamagata University, Kyushu University, Riken, National Institute forMaterials Science, Stanford University (USA), Princeton University (USA), Strasbourg University (France), Fraunhofer Institute(Germany), Humboldt University (Germany), Peking University (People's Republic of China), South China University ofTechnology (People's Republic of China), Industrial Technology Research Institute (the Republic of China), Korea Electronics
Technology Institute (Republic of Korea), Kyungpook National University (Republic of Korea), VISTIC (Thailand), IMRE(Singapore), CSIRO (Australia), KAUST (Saudi Arabia)(*Based on papers published)*	Data from the AC series has contributed to more than 1,600 papers, with numerous instances of use in research bycorporate research organizations.
Easily searched for on the web using the keywords "Rikenkeiki, AC-2, AC-3".

11

Comparison of AC Series Atmospheric Photoemission Yield
Spectrometer Specifications
Model

AC-5

AC-2

AC-3

Measurement principle

Photoemission Yield Spectroscopy in Air (Low-energy electron counting)Electron detector

Open counter

Photoelectron measurement
energy scanning range

3.4 eV to 6.2 eV (364 nm to 200 nm)

4.0 eV to 7.0 eV (310 nm to 177 nm)

Light intensity measurement
energy scanning range

3.4 eV to 6.2 eV (364 nm to 200 nm)

4.0 eV to 7.0 eV (310 nm to 177 nm)

Repeatability(standard deviation)Work function 0.02 eV (sample: metal plate)

Measurement timeStandard time required for work function measurement: Approx. 5 minutes

Maximum count rate
(CPS: Number of electrons
measurable per second)

4,000CPS

2,000CPSUV lampD2 lamp

Minimum light intensity

Below 1.0 nW (at 5.9 eV)

Below 5.0 nW (at 5.9 eV)Maximum light intensity

Over 500 nW (at 5.9 eV)Over 100 nW (at 5.9 eV)

UV spot size

Below 4 mm × 4 mm
(Varies with energy due to condenser lens chromatic aberrations.)

2 mm × 5 mm
(No chromatic aberrations because lightis condensed using a concave mirror)

Spectrometer

Grating-type monochromator

Nitrogen-substitution grating-type
monochromator

50 mm × 50 mm (max.)
Max. thickness 10 mm (max.),
1-point measurement

30 mm × 30 mm (max.)
Max. thickness 10 mm (max.),
1-point measurement

Sample shape

180 mm × 180 mm (max.)
Max. thickness 1.0 mm ±0.2 mm

Measurement location

Multiple locations can be specified
on the sample stage for sequential
measurement.

Measures sample center.

15°C to 35°C
Dew point -30°C or higher, 60% RH or
less

15°C to 35°C, 20% to 60% RH

Sample stage

Operating temperature/humidity range
Power supply

100 V to 240 V AC, 50/60 Hz, 5 A (Max)Compressed air

High-purity air 0.2 MPa to 0.3 MPa,
0.2 L/min (measurement),
2 L/min (purging)

High-pressure nitrogenNot required

External dimensions

AAC-5 LC (light source unit):
Approx. 470 (W) × 500 (D) × 300 (H) mm
AC-5 DC (measuring unit):
Approx. 600 (W) × 500 (D) × 380 (H) mm(excluding rubber feet and other protrusions)AC-2 LC1 (light source unit):
Approx. 600 (W) × 450 (D) × 310 (H) mm
Approx. 740 (W) × 680 (D) × 1,080 (H) mm
AC-2 DC1 (measuring unit):(including casters)
Approx. 600 (W) × 450 (D) × 360 (H) mm(excluding rubber feet and other protrusions)

WeightAC-5 LC (light source unit): Approx. 35 kg
AC-5 DC (measuring unit): Approx. 50 kg

AC-2 LC1 (light source unit): Approx. 40 kg
AC-2 DC1 (measuring unit): Approx. 50 kg

Approx. 120 kg

CE Marking

CE Marking, UL/cUL

CE Marking

Certifications andApprovals

0.5 MPa to 0.7 MPa, 5 L/min
Not required

0.5 MPa to 0.6 MPa, 2 L/min (measurement),
5 L/min (purging)Distributed by:

2 -7-6 Azusawa, Itabashi-ku, Tokyo 174 - 8744, Japan

Phone : +81-3-3966-1113
Telefax : +81-3-3558-9110
E-mail : intdept@rikenkeiki.co.jp
Web site : http://www.rikenkeiki.co.jp/english* The information in this catalog may bechanged without notice for improvements.

PC9-0331-191110 S